Written by &you Labs Team
Updated October 10, 2026
Maybe you have never had a full blood test. Maybe you have only had a basic yearly checkup. Either way, a full blood test is easier to understand than it looks. This guide walks you through what to test, how to prepare, and what your results mean.
By the end, you will know how a blood test works from start to finish. You will also know how to read your own report with confidence.
A full blood test checks about 30 to 50 health markers, called biomarkers, from one blood draw. A biomarker is simply a substance in your blood that shows how a body system is working. A starter panel usually checks your blood cells, blood sugar, heart health, liver, kidneys, thyroid, nutrients, and inflammation. Fast for 8 to 12 hours before the draw, book a morning slot, and drink plenty of water beforehand.
Blood testing is one of the most useful health tools you have. Here is why.
A full blood test answers two different questions. First, do you have a disease right now? Doctors check this using the lab's normal range. Second, are you heading toward good health or poor health? This uses a healthy target range instead. Both questions matter.
A truly complete panel checks eight groups of markers.
1. Complete blood count (CBC). This counts your red cells, white cells, and platelets. It can spot anemia, infection, or inflammation.
2. Blood sugar and diabetes risk. This includes HbA1c, fasting glucose, and fasting insulin. These catch pre diabetes early, often before you feel any symptoms.
3. Heart and blood vessel health. This covers your cholesterol test (LDL, HDL, triglycerides), ApoB, lipoprotein(a), and hs-CRP. Together they show your risk for heart disease.
4. Liver health. ALT, AST, GGT, bilirubin, and albumin show how well your liver is working. They can flag fatty liver or the effect of alcohol or medicine.
5. Kidney health. Creatinine, eGFR, BUN, and uric acid show how well your kidneys filter waste. They can also flag gout risk.
6. Thyroid health. TSH, Free T3, and Free T4 show if your thyroid gland is running too slow or too fast.
7. Nutrient levels. Vitamin D, B12, folate, and ferritin (a marker of stored iron) catch common deficiencies.
8. Inflammation. hs-CRP and homocysteine reveal quiet, ongoing inflammation in your body.
Together, that is about 35 to 45 markers from a single draw.
A nurse, or a trained phlebotomist (a professional trained to draw blood), takes your sample from a vein in your arm. She may fill more than one small tube, since different tests need different tubes. The draw takes about 5 to 10 minutes and uses about 1 to 2 tablespoons of blood.
Your samples go to an accredited lab. Machines there measure each marker. A few rare markers go to specialty labs that focus on just that one test.
Once testing finishes, you get a full report. Most common markers are ready faster than the more specialized ones.
The night before:
The morning of:
What to bring:
Blood draws happen in many settings. Clinics, hospitals, and lab branches all offer them. What matters most is the lab that processes your sample. An accredited lab gives accurate results no matter where the sample was drawn.
You will feel a quick sting for a second or two when the needle goes in. A cuff, called a tourniquet, tightens briefly around your arm first. Most people say it hurts less than they expected.
If needles make you nervous, tell your nurse. Look away from the needle if that helps. Lie down instead of sitting if you tend to feel lightheaded. Slow breathing and good hydration also help.
After the draw, keep the bandage on for 30 to 60 minutes. Eat right away to end your fast. Light activity is fine, but avoid heavy lifting with that arm for an hour or two. A little bruising is normal.
Will it hurt? Most people rate it 2 or 3 out of 10 for pain. It is often less painful than a vaccine shot.
What if my veins are hard to find? Trained nurses know several tricks, like trying a different vein or warming your arm first. Good hydration also makes veins easier to find.
What if I feel lightheaded? A small number of people feel briefly dizzy during or after a draw. Lying down, breathing slowly, and drinking water afterward all help. Tell your nurse if this has happened to you before.
Do I have to watch the needle? No. Ask your nurse to keep the tubes out of your sight if you prefer not to look.
How much blood do they take? About 1 to 2 tablespoons total. Your body replaces this within a day or two.
Your report shows each marker's name, your value, the lab's normal range, and the units used, such as mg/dL. Values outside the normal range are often flagged with an H for high or an L for low.
Read your report in five steps:
The lab's normal range tells you if a disease is likely present right now. The healthy target range aims higher, at the level where research shows people do best over the long run. Ask both questions for every marker: is it in the normal range, and is it in the healthy target range? The space between the two is where prevention happens.
If everything sits in the healthy target range, keep doing what you are doing and test again next year.
If a few markers sit in the normal range but not the healthy range, pick your top two or three targets. Work on them for 8 to 12 weeks, then retest just that group.
If a marker is flagged as abnormal, talk to your doctor about the right next step.
A healthy adult with no risk factors can test once a year, plus a one-time lipoprotein(a) check. Someone with risk factors should test the relevant group every six months. Someone actively working on their health may retest a specific group every three months. Retest 8 to 12 weeks after starting a new medicine or making a big lifestyle change.
Skipping the extra markers. A basic annual checkup often misses HbA1c, fasting insulin, ApoB, hs-CRP, vitamin D, B12, ferritin, and full thyroid testing.
Not fasting properly. Eating before a fasting test throws off your blood sugar, insulin, and cholesterol numbers.
Testing while sick. Many markers shift during a recent illness. Wait two to four weeks after you recover for an accurate baseline.
Reading one number alone. A single "normal" result inside a worrying pattern can still be a problem.
Acting on one result. Trends across two or more tests matter more than a single reading.
Trying to fix everything at once. Pick your top two or three targets instead. Changes are easier to stick with that way.
Skipping the retest. Without a retest, you cannot tell if your changes worked.
Your first blood test does not need to be stressful. A comprehensive panel covers a wide set of markers by default. Your results show up on a clear digital dashboard, with both the normal range and the healthy target range shown side by side, plus a doctor's written notes.
Want a full walkthrough first? See how the &you Labs testing process works, from booking to results. When you are ready, book a &you Labs panel and get your own numbers explained in plain language.
There is no single best test. If you had to pick one, HbA1c gives useful information about long-term blood sugar. But a full panel covering blood sugar, heart health, and inflammation tells you far more than any one test alone.
The test itself changes nothing in your body. What changes is your awareness. Knowing your own numbers often motivates people to build better habits.
Most results are reassuring or easy to act on. Serious findings are rare. Small, fixable issues are common, and finding them early is the whole point of testing.
Many results run in families. This is especially true for lipoprotein(a), cholesterol problems, and hepatitis B, which is common in the Philippines.
The &you Labs Team combines medical science with personal care. We help Filipinos understand their health markers with blood work analysis that is easy to follow, whole person support, and health expertise built for Filipino life.
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